Methods for indicating and determination large-scale channel parameter, base station and terminal device

ABSTRACT

The present disclosure provides an indication method, including: determining first transmission resources related to a transmission channel for a large-scale channel parameter or a group of large-scale channel parameters, and transmitting configuration information about the first transmission resources to a terminal device via first signaling, the first transmission resources being transmission resources for K downlink reference signals, K being a positive integer; and selecting second transmission resources from the first transmission resources in accordance with a transmission parameter used by the transmission channel, and transmitting indication information about the second transmission resources to the terminal device via second signaling, the second transmission resources being transmission resources for L downlink reference signals, L being a positive integer, and K being greater than or equal to L.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims a priority of the Chinese patentapplication No. 201710065797.7 filed on Feb. 6, 2017, which isincorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of communicationapplication, in particular to methods for indicating and determining alarge-scale channel parameter, a base station and a terminal device.

BACKGROUND

Multiple-Input Multiple-Output (MIMO) technique plays an important rolein improving a peak rate and a system spectrum utilization rate, so sucha wireless access technology standard as Long Term Evolution (LTE) orLTE-Advanced (LTE-A) is established on the basis of MIMO+OrthogonalFrequency Division Multiplexing (OFDM). For the MIMO technique, itsperformance gain is derived from a spatial freedom degree capable ofbeing acquired by a multi-antenna system, so the most importantdevelopment direction of the standardization of the MIMO technology liesin the extension of dimensions.

An LTE Release 8 (Rel-8) system may support the MIMO transmissionthrough at most four layers. An LTE Re1-9 system focuses on theenhancement of a Multi-User MIMO (MU-MIMO) technique, and it may supportthe MU-MIMO transmission through at most four downlink data layers in aTransmission Mode (TM)-8. In an LTE Rel-10 system, eight antenna portsmay be supported, so as to improve a spatial resolution of Channel StateInformation (CSI) and extend a transmission capability of Single-UserMIMO (SU-MIMO) to at most eight data layers. In Rel-13 and Rel-14systems, a Full Dimension-MIMO (FD-MIMO) technique has been introducedso as to support 32 antenna ports, thereby to achieve a beamformingoperation in horizontal and vertical dimensions (full-dimension).

In order to further improve the MIMO technology, a massive antennatechnique has been introduced into a mobile communication system. For abase station, a massive, full-digital antenna includes up to 128, 256 or512 antenna elements, and up to 128, 256 or 512 transceivers, and eachantenna element is connected to one transceiver. Through thetransmission of a pilot signal through up to 128, 256 or 512 antennaports, it is able for a User Equipment (UE) to measure the CSI andtransmit a feedback message. The UE may also be configured with anantenna array including up to 32 or 64 antenna elements. Throughbeamforming operations at the base station and the UE, it is able toacquire a huge beamforming gain, thereby to prevent the occurrence ofsignal attenuation caused by path losses. Especially for communicationat a high frequency band, e.g., at a frequency of 30 GHz, a radio signalhas a very limited coverage range due to the path losses. Through themassive antenna technique, it is able to extend the coverage range ofthe radio signal to an applicable range.

For a full digital antenna array, each antenna element is provided withan individual transceiver, so a size of a resultant device as well asthe cost and power consumption thereof may increase significantly.Especially for an analog-to-digital converter (ADC) and adigital-to-analog converter (DAC) of the transceiver, it is merely ableto decrease the power consumption and increase the performance in alimited manner. In order to reduce the size, the cost and the powerconsumption of the device, an analog beamforming-based scheme has beenproposed. In order to further improve the analog beamformingperformance, digital-analog hybrid beamforming transmission/receptionarchitecture has been proposed. For the hybrid beamforming architecture,a balance has been made between the digital beamforming flexibility andthe low analog beamforming complexity.

For both the analog beamforming and the digital-analog hybridbeamforming, it is necessary to adjust a an analog beamforming weightvalue at the transmitting end and the receiving end, so as to enable aresultant beam to be directed to an opposite end. However, in therelated art, before the data transmission, it is difficult for thereceiver to determine a large-scale channel parameter related todownlink reception, e.g., a space parameter, and it is impossible to setappropriate reception beams, so reception reliability of the terminaldevice is adversely affected.

SUMMARY

An object of the present disclosure is to provide methods for indicatingand determining a large-scale channel parameter, a base station and aterminal device, so as to solve the problem in the related art where itis impossible for a receiving end to determine the large-scale channelparameter related to downlink reception.

In one aspect, the present disclosure provides in some embodiments amethod for indicating a large-scale channel parameter, including:determining first transmission resources related to a transmissionchannel for a large-scale channel parameter or a group of large-scalechannel parameters, and transmitting configuration information about thefirst transmission resources to a terminal device via first signaling,the first transmission resources being transmission resources for Kdownlink reference signals, K being a positive integer; and selectingsecond transmission resources from the first transmission resources inaccordance with a transmission parameter used by the transmissionchannel, and transmitting indication information about the secondtransmission resources to the terminal device via second signaling, thesecond transmission resources being transmission resources for Ldownlink reference signals, L being a positive integer, and K beinggreater than or equal to L.

In some possible embodiments of the present disclosure, the indicationinformation includes information about indexes of the secondtransmission resources in the first transmission resources.

In some possible embodiments of the present disclosure, theconfiguration information includes group information acquired after thefirst transmission resources are grouped in accordance with apredetermined grouping standard, and the predetermined grouping standardincludes grouping the transmission resources for the downlink referencesignals with a same large-scale channel parameter into one group, orgrouping the transmission resources received via a same reception beaminto one group, or grouping the transmission resources having a samechannel transmission requirement into one group.

In some possible embodiments of the present disclosure, prior todetermining the first transmission resources related to the transmissionchannel for the large-scale channel parameter or the group oflarge-scale channel parameters, the method further includes configuringthird transmission resources for the terminal device, and transmittingconfiguration information about the third transmission resources to theterminal device via third signaling. The third transmission resourcesare transmission resources for N downlink reference signals, where N isgreater than or equal to K.

In some possible embodiments of the present disclosure, the determiningthe first transmission resources related to the transmission channel forthe large-scale channel parameter or the group of large-scale channelparameters includes determining the first transmission resources fromthe third transmission resources.

In some possible embodiments of the present disclosure, the determiningthe first transmission resources from the third transmission resourcesincludes: acquiring measurement results of the third transmissionresources measured by the terminal device or a base station itself inaccordance with a predetermined quality index; and determining the firsttransmission resources from the third transmission resources inaccordance with the measurement results.

In some possible embodiments of the present disclosure, the determiningthe first transmission resources from the third transmission resourcesin accordance with the measurement results includes: ranking themeasurement results of the third transmission resources in a descendingorder to acquire a rank list; and determining transmission resources forthe downlink reference signals corresponding to previous K measurementresults in the rank list as the first transmission resources.

In some possible embodiments of the present disclosure, the determiningthe first transmission resources from the third transmission resourcesin accordance with the measurement results includes: determining a firsttransmission beam used by a transmission resource for an optimaldownlink reference signal in accordance with the measurement results;determining K second transmission beams adjacent to the firsttransmission beam, a difference between a spatial directional angle ofeach second transmission beam and a spatial directional angle of thefirst transmission beam being within a predetermined range; anddetermining transmission resources for K downlink reference signalscorresponding to the K second transmission beams as the firsttransmission resources.

In some possible embodiments of the present disclosure, the determiningthe first transmission resources related to the transmission channel forthe large-scale channel parameter or the group of large-scale channelparameters includes processing transmission resources for the downlinkreference signals in accordance with the third transmission resources,so as to acquire the first transmission resources and the configurationinformation about the first transmission resources. The configurationinformation includes large-scale channel parameter indicationinformation indicating relevant information about an antenna port foreach transmission resource of the first transmission resources and anantenna port for one or more transmission resources of the thirdtransmission resources with respect to the large-scale channel parameteror the group of large-scale channel parameters.

In some possible embodiments of the present disclosure, the selectingthe second transmission resources from the first transmission resourcesin accordance with the transmission parameter used by the transmissionchannel includes selecting transmission resources identical to orrelated to the transmission parameter used by the transmission channelfrom the first transmission resources as the second transmissionresources.

In some possible embodiments of the present disclosure, the selectingthe transmission resources identical to or related to the transmissionparameter used by the transmission channel from the first transmissionresources as the second transmission resources includes selectingtransmission resources using a same transmission beam as thetransmission channel from the first transmission resources as the secondtransmission resources.

In some possible embodiments of the present disclosure, the selectingthe transmission resources related to the transmission parameter used bythe transmission channel from the first transmission resources as thesecond transmission resources includes determining relevant transmissionbeams which belong to a same beam group as the transmission beam used bythe transmission channel, and selecting transmission resourcestransmitted via the relevant transmission beams from the firsttransmission resources as the second transmission resources. A pluralityof transmission beams whose spatial directional angles are within apredetermined range or a plurality of transmission beams received via asame reception beam belong to the same beam group.

In some possible embodiments of the present disclosure, the firstsignaling is signaling from a Media Access Control (MAC) Control Element(CE), and the second signaling is Downlink Control Information (DCI).

In some possible embodiments of the present disclosure, the large-scalechannel parameter includes space parameter, delay spread, average delay,Doppler frequency offset, Doppler spread or average gain. The group oflarge-scale channel parameters includes at least two of space parameter,delay spread, average delay, Doppler frequency offset, Doppler spreadand average gain.

In another aspect, the present disclosure provides in some embodiments amethod for determining a large-scale channel parameter, including:acquiring configuration information about first transmission resourcestransmitted by a base station via first signaling, the firsttransmission resources being transmission resources for K downlinkreference signals, the first transmission resources being related to atransmission channel for a large-scale channel parameter or a group oflarge-scale channel parameters, K being a positive integer; acquiringindication information about second transmission resources transmittedby the base station via second signaling, the second transmissionresources being transmission resources selected by the base station fromthe first transmission resources in accordance with a transmissionparameter used by the transmission channel, the second transmissionresources being transmission resources for L downlink reference signals,L being a positive integer, and K being greater than or equal to L; anddetermining the large-scale channel parameter of the transmissionchannel in accordance with the indication information and theconfiguration information about the first transmission resources.

In some possible embodiments of the present disclosure, subsequent todetermining the large-scale channel parameter of the transmissionchannel in accordance with the indication information and theconfiguration information about the first transmission resources, themethod further includes determining a reception beam for thetransmission channel in accordance with the large-scale parameter of thetransmission channel.

In some possible embodiments of the present disclosure, the determiningthe large-scale channel parameter of the transmission channel inaccordance with the indication information and the configurationinformation about the first transmission resource includes: measuringthe K downlink reference signals transmitted via the first transmissionresources in accordance with the configuration information about thefirst transmission resources, so as to determine large-scale channelparameters of the K downlink reference signals transmitted via the firsttransmission resources; acquiring large-scale channel parameters of theL downlink reference signals in the K downlink reference signals inaccordance with information about indexes of the second transmissionresources in the first transmission resources and the large-scalechannel parameters of the K downlink reference signals; and determiningthe large-scale channel parameter of the transmission channel inaccordance with relevant information about the L downlink referencesignals and the transmission channel with respect to the large-scalechannel parameter or the group of large-scale channel parameters as wellas the large-scale channel parameter of the L downlink referencesignals.

In some possible embodiments of the present disclosure, theconfiguration information includes group information acquired after thefirst transmission resources are grouped in accordance with apredetermined grouping standard, and the predetermined grouping standardincludes grouping the transmission resources for the downlink referencesignals with a same large-scale channel parameter into one group, orgrouping the transmission resources received via a same reception beaminto one group, or grouping the transmission resources having a samechannel transmission requirement into one group. The determining thelarge-scale channel parameter of the K downlink reference signalstransmitted via the first transmission resources in accordance with theconfiguration information about the first transmission resourcesincludes determining the large-scale channel parameter of each group oftransmission resources in the first transmission resources in accordancewith the group information.

In some possible embodiments of the present disclosure, prior toacquiring the configuration information about the first transmissionresources transmitted by the base station via the first signaling, themethod further includes: acquiring third transmission resourcestransmitted by the base station via the first signaling, the thirdtransmission resources being transmission resources for N downlinkreference signals, N being greater than or equal to K; and measuring thethird transmission resources in accordance with a predetermined qualityindex to acquire measurement results, and transmitting the measurementresults to the base station, so as to enable the base station todetermine the first transmission resources from the third transmissionresources in accordance with the measurement results.

In yet another aspect, the present disclosure provides in someembodiments a base station, including: a first processing moduleconfigured to determine first transmission resources related to atransmission channel for a large-scale channel parameter or a group oflarge-scale channel parameters, and transmit configuration informationabout the first transmission resources to a terminal device via firstsignaling, the first transmission resources being transmission resourcesfor K downlink reference signals, K being a positive integer; and asecond processing module configured to select second transmissionresources from the first transmission resources in accordance with atransmission parameter used by the transmission channel, and transmitindication information about the second transmission resources to theterminal device via second signaling, the second transmission resourcesbeing transmission resources for L downlink reference signals, L being apositive integer, and K being greater than or equal to L.

In some possible embodiments of the present disclosure, the indicationinformation includes information about indexes of the secondtransmission resources in the first transmission resources.

In some possible embodiments of the present disclosure, theconfiguration information includes group information acquired after thefirst transmission resources are grouped in accordance with apredetermined grouping standard, and the predetermined grouping standardincludes grouping the transmission resources for the downlink referencesignals with a same large-scale channel parameter into one group, orgrouping the transmission resources received via a same reception beaminto one group, or grouping the transmission resources having a samechannel transmission requirement into one group.

In some possible embodiments of the present disclosure, the base stationfurther includes a configuration module configured to configure thirdtransmission resources for the terminal device, and transmitconfiguration information about the third transmission resources to theterminal device via third signaling. The third transmission resourcesare transmission resources for N downlink reference signals, where N isgreater than or equal to K.

In some possible embodiments of the present disclosure, the firstprocessing module is further configured to determine the firsttransmission resources from the third transmission resources.

In some possible embodiments of the present disclosure, the firstprocessing module includes: a first acquisition sub-module configured toacquire measurement results of the third transmission resources measuredby the terminal device or the base station itself in accordance with apredetermined quality index; and a first determination sub-moduleconfigured to determine the first transmission resources from the thirdtransmission resources in accordance with the measurement results.

In some possible embodiments of the present disclosure, the firstdetermination sub-module includes: a ranking unit configured to rank themeasurement results of the third transmission resources in a descendingorder to acquire a rank list; and a first determination unit configuredto determine transmission resources for the downlink reference signalscorresponding to previous K measurement results in the rank list as thefirst transmission resources.

In some possible embodiments of the present disclosure, the firstdetermination sub-module includes: a second determination unitconfigured to determine a first transmission beam used by a transmissionresource for an optimal downlink reference signal in accordance with themeasurement results; a third determination unit configured to determineK second transmission beams adjacent to the first transmission beam, adifference between a spatial directional angle of each secondtransmission beam and a spatial directional angle of the firsttransmission beam being within a predetermined range; and a fourthdetermination unit configured to determine transmission resources for Kdownlink reference signals corresponding to the K second transmissionbeams as the first transmission resources.

In some possible embodiments of the present disclosure, the firstprocessing module is further configured to process transmissionresources for the downlink reference signals through an MAC CE inaccordance with the third transmission resources, so as to acquire thefirst transmission resources and the configuration information about thefirst transmission resources. The configuration information includeslarge-scale channel parameter indication information indicating relevantinformation about an antenna port for each transmission resource of thefirst transmission resources and an antenna port for one or moretransmission resources of the third transmission resources with respectto the large-scale channel parameter or the group of large-scale channelparameters.

In some possible embodiments of the present disclosure, the secondprocessing module is further configured to select transmission resourcesidentical to or related to the transmission parameter used by thetransmission channel from the first transmission resources as the secondtransmission resources.

In some possible embodiments of the present disclosure, the secondprocessing module includes a first selection sub-module configured toselect transmission resources using a same transmission beam as thetransmission channel from the first transmission resources as the secondtransmission resources.

In some possible embodiments of the present disclosure, the secondprocessing module includes a second selection sub-module configured todetermine relevant transmission beams which belong to a same beam groupas the transmission beam used by the transmission channel, and selecttransmission resources transmitted via the relevant transmission beamsfrom the first transmission resources as the second transmissionresources. A plurality of transmission beams whose spatial directionalangles are within a predetermined range or a plurality of transmissionbeams received via a same reception beam belong to the same beam group.

In some possible embodiments of the present disclosure, the firstsignaling is signaling from the MAC CE, and the second signaling is DCI.

In some possible embodiments of the present disclosure, the large-scalechannel parameter includes space parameter, delay spread, average delay,Doppler frequency offset, Doppler spread or average gain. The group oflarge-scale channel parameters includes at least two of space parameter,delay spread, average delay, Doppler frequency offset, Doppler spreadand average gain.

In still yet another aspect, the present disclosure provides in someembodiments a terminal device, including: a first acquisition moduleconfigured to acquire configuration information about first transmissionresources transmitted by a base station via first signaling, the firsttransmission resources being transmission resources for K downlinkreference signals, the first transmission resources being related to atransmission channel for a large-scale channel parameter or a group oflarge-scale channel parameters, K being a positive integer; a secondacquisition module configured to acquire indication information aboutsecond transmission resources transmitted by the base station via secondsignaling, the second transmission resources being transmissionresources selected by the base station from the first transmissionresources in accordance with a transmission parameter used by thetransmission channel, the second transmission resources beingtransmission resources for L downlink reference signals, L being apositive integer, and K being greater than or equal to L; and a firstdetermination module configured to determine the large-scale channelparameter of the transmission channel in accordance with the indicationinformation and the configuration information about the firsttransmission resources.

In some possible embodiments of the present disclosure, the terminaldevice further includes a second determination module configured todetermine a reception beam for the transmission channel in accordancewith the large-scale parameter of the transmission channel.

In some possible embodiments of the present disclosure, the firstdetermination module includes: a second determination sub-moduleconfigured to measure the K downlink reference signals transmitted viathe first transmission resources in accordance with the configurationinformation about the first transmission resources, so as to determinelarge-scale channel parameters of the K downlink reference signalstransmitted via the first transmission resources; a second acquisitionsub-module configured to acquire large-scale channel parameters of the Ldownlink reference signals in the K downlink reference signals inaccordance with information about indexes of the second transmissionresources in the first transmission resources and the large-scalechannel parameters of the K downlink reference signals; and a thirddetermination sub-module configured to determine the large-scale channelparameter of the transmission channel in accordance with relevantinformation about the L downlink reference signals and the transmissionchannel with respect to the large-scale channel parameter or the groupof large-scale channel parameters as well as the large-scale channelparameter of the L downlink reference signals.

In some possible embodiments of the present disclosure, theconfiguration information includes group information acquired after thefirst transmission resources are grouped in accordance with apredetermined grouping standard, and the predetermined grouping standardincludes grouping the transmission resources for the downlink referencesignals with a same large-scale channel parameter into one group, orgrouping the transmission resources received via a same reception beaminto one group, or grouping the transmission resources having a samechannel transmission requirement into one group. The first determinationmodule is further configured to determine the large-scale channelparameter of each group of transmission resources in the firsttransmission resources in accordance with the group information.

In some possible embodiments of the present disclosure, the terminaldevice further includes: a third acquisition module configured toacquire third transmission resources transmitted by the base station viathe first signaling, the third transmission resources being transmissionresources for N downlink reference signals, N being greater than orequal to K; and a measurement module configured to measure the thirdtransmission resources in accordance with a predetermined quality indexto acquire measurement results, and transmit the measurement results tothe base station, so as to enable the base station to determine thefirst transmission resources from the third transmission resources inaccordance with the measurement results.

In still yet another aspect, the present disclosure provides in someembodiments a network side device, including a processor, a memory, anda computer program stored in the memory and executed by the processor.The processor is configured to execute the computer program so as toimplement the above-mentioned method for indicating a large-scalechannel parameter.

In still yet another aspect, the present disclosure provides in someembodiments a terminal side device, including a processor, a memory, anda computer program stored in the memory and executed by the processor.The processor is configured to execute the computer program so as toimplement the above-mentioned method for determining a large-scalechannel parameter.

In still yet another aspect, the present disclosure provides in someembodiments a computer-readable storage medium storing therein acomputer program. The computer program is executed by a processor so asto implement the above-mentioned method for indicating a large-scalechannel parameter.

In still yet another aspect, the present disclosure provides in someembodiments a computer-readable storage medium storing therein acomputer program. The computer program is executed by a processor so asto implement the above-mentioned method for determining a large-scalechannel parameter.

The present disclosure has the following beneficial effects. The basestation may determine the first transmission resources related to thetransmission channel for the large-scale channel parameter of the groupof large-scale channel parameters and transmit the configurationinformation about the first transmission resources to the terminaldevice via the first signaling, and the first transmission resources maybe transmission resources for the K downlink reference signals. Then,the base station may select the second transmission resources from thefirst transmission resources in accordance with a transmission parameterused by the transmission channel and transmit the indication informationabout the second transmission resources to the terminal device via thesecond signaling, and the second transmission resources may betransmission resources for the L downlink reference signals. As aresult, it is able for the terminal device to determine the large-scalechannel parameter of the transmission channel in accordance with theindication information and the configuration information about the firsttransmission resources, and determine the corresponding reception beamin accordance with the large-scale channel parameter of the transmissionchannel, thereby to improve the reception reliability of the terminaldevice.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate the technical solutions of the present disclosureor the related art in a clearer manner, the drawings desired for thepresent disclosure or the related art will be described hereinafterbriefly. Obviously, the following drawings merely relate to someembodiments of the present disclosure, and based on these drawings, aperson skilled in the art may obtain the other drawings without anycreative effort.

FIG. 1 is a flow chart of a method for indicating a large-scale channelparameter according to some embodiments of the present disclosure;

FIG. 2 is another flow chart of the method for indicating a large-scalechannel parameter according to some embodiments of the presentdisclosure;

FIG. 3 is yet another flow chart of the method for indicating alarge-scale channel parameter according to some embodiments of thepresent disclosure;

FIG. 4 is a flow chart of a method for determining a large-scale channelparameter according to some embodiments of the present disclosure;

FIG. 5 is a block diagram of a base station according to someembodiments of the present disclosure;

FIG. 6 is another block diagram of the base station according to someembodiments of the present disclosure;

FIG. 7 is yet another block diagram of the base station according tosome embodiments of the present disclosure;

FIG. 8 is a block diagram of a terminal device according to someembodiments of the present disclosure;

FIG. 9 is another block diagram of the terminal device according to someembodiments of the present disclosure; and

FIG. 10 is yet another block diagram of the terminal device according tosome embodiments of the present disclosure.

DETAILED DESCRIPTION

In order to make the objects, the technical solutions and the advantagesof the present disclosure more apparent, the present disclosure will bedescribed hereinafter in a clear and complete manner in conjunction withthe drawings and embodiments.

An object of the present disclosure is to provide methods for indicatingand determining a large-scale channel parameter, a base station and aterminal device, so as to solve the problem in the related art where itis impossible for a receiving end to determine the large-scale channelparameter related to downlink reception.

First Embodiment

As shown in FIG. 1, the present disclosure provides in this embodiment amethod for indicating a large-scale channel parameter for use in a basestation, which includes the following steps.

Step 101: determining first transmission resources related to atransmission channel for a large-scale channel parameter or a group oflarge-scale channel parameters, and transmitting configurationinformation about the first transmission resources to a terminal devicevia first signaling, the first transmission resources being transmissionresources for K number of downlink reference signals, K being a positiveinteger.

Here, the large-scale channel parameter may include space parameter,delay spread, average delay, Doppler frequency offset, Doppler spread oraverage gain, and the group of large-scale channel parameters mayinclude at least two of pace parameter, delay spread, average delay,Doppler frequency offset, Doppler spread or average gain. The firstsignaling may be activation signaling from an MAC CE. K may bedetermined in accordance with the requirement on a system overhead and acapability of the terminal device, and the first signaling may besignaling from the MAC CE.

The first transmission resources being related to the transmissionchannel for the large-scale channel parameter or the group oflarge-scale channel parameters may refer to that the first transmissionresources are related to a same large-scale channel parameter of a samegroup of large-scale channel parameters of the transmission channel. Forexample, the first transmission resources may be quasi co-located (QCL)with a same space parameter of the transmission channel.

To be specific, the first transmission resources may be resources quasico-located with the transmission channel for the large-scale channelparameter or the group of large-scale channel parameters.

The configuration information may include time-frequency resourcestransmitted via each antenna port for a downlink reference signal andsequence configuration information. The transmission resource for eachdownlink reference signal may include antenna ports for P number ofdownlink reference signals (P downlink reference signals), e.g., P=1, 2or any other value. A value of P may be configured by the base stationthrough signaling, i.e., the base station may set the value of P for thetransmission resource for each downlink reference signal, and transmitthe value of P to the terminal device through the configurationinformation about the transmission resource for the downlink referencesignal. In addition, the value of P may also be a constant value, e.g.,P=1 as agreed in a protocol.

The transmission resource for each downlink reference signal may betransmitted via one transmission beam, and the transmission resourcesfor different reference signals may correspond to different transmissionbeams.

Here, the configuration information about the first transmissionresources may be transmitted to the terminal device, so that theterminal device may determine the large-scale channel parameter of the Kdownlink reference signals transmitted via the first transmissionresources in accordance with the configuration information.

Step 102: selecting second transmission resources from the firsttransmission resources in accordance with a transmission parameter usedby the transmission channel, and transmitting indication informationabout the second transmission resources to the terminal device viasecond signaling, the second transmission resources being transmissionresources for L number of downlink reference signals (L downlinkreference signals), L being a positive integer, and K being greater thanor equal to L.

Here, the indication information may include information about indexesof the second transmission resources in the first transmissionresources. The second signaling may be DCI. The transmission parametermay be a transmission beam or a transmission point.

In Step 102, the indication information may be transmitted to theterminal device, so that the terminal device may acquire the large-scalechannel parameter of the L downlink reference signals in the K downlinkreference signals in accordance with the indication information and thelarge-scale channel parameter of the K downlink reference signals.

According to the method in the first embodiment of the presentdisclosure, the base station may determine the first transmissionresources related to the transmission channel for the large-scalechannel parameter of the group of large-scale channel parameters andtransmit the configuration information about the first transmissionresources to the terminal device via the first signaling, and the firsttransmission resources may be transmission resources for the K downlinkreference signals. Then, the base station may select the secondtransmission resources from the first transmission resources inaccordance with a transmission parameter used by the transmissionchannel and transmit the indication information about the secondtransmission resources to the terminal device via the second signaling,and the second transmission resources may be transmission resources forthe L downlink reference signals. As a result, it is able for theterminal device to determine the large-scale channel parameter of thetransmission channel in accordance with the indication information andthe configuration information about the first transmission resources,and determine the corresponding reception beam in accordance with thelarge-scale channel parameter of the transmission channel, thereby toimprove the reception reliability of the terminal device.

Second Embodiment

As shown in FIG. 2, the present disclosure further provides in thisembodiment a method for indicating a large-scale channel parameter foruse in a base station, which includes the following steps.

Step 201: configuring third transmission resources for the terminaldevice, and transmitting configuration information about the thirdtransmission resources to the terminal device via third signaling, thethird transmission resources being transmission resources for N numberof downlink reference signals (N downlink reference signals), N beinggreater than or equal to K.

To be specific, the base station may configure for the terminal devicethe transmission resources for the N downlink reference signals, andeach downlink reference signal may be a Channel StateInformation-Reference Signal (CSI-RS). The configuration informationabout the transmission resource for each downlink reference signal mayinclude time-frequency resources transmitted via a group of downlinkreference signal ports, and sequence configuration information about thedownlink reference signals. Here, the signaling may be high-layersignaling or a broadcasting message.

When the downlink reference signal is a CSI-RS, the N number of CSI-RSresources may include all the CSI-RS transmission resources for a beammanagement procedure. The subsequent method may also be applicable whenthe CSI-RS transmission resources are replaced with CSI_RS port groupsor CSI-RS ports.

Further, each CSI-RS transmission resource may include P number ofCSI-RS ports, e.g., P=1, 2 or any other value. A value of P may beconfigured by the base station through signaling, i.e., the base stationmay set the value of P for each CSI-RS transmission resource, andtransmit the value of P to the terminal device through the configurationinformation about the CSI-RS transmission resource. In addition, thevalue of P may also be a constant value, e.g., P=1 as agreed in aprotocol.

Each CSI-RS transmission resource may be transmitted via onetransmission beam, and different CSI-RS resources may correspond todifferent transmission beams.

In Step 201, through the configuration of the transmission resources forthe N downlink reference signals, the transmission resources for the Ndownlink reference signals may be all the transmission resources for thedownlink reference signals in the beam management procedure, so it isable for the terminal device to acquire the large-scale channelparameter of the transmission channel in a better manner.

Step 202: determining the first transmission resources from the thirdtransmission resources, and transmitting configuration information aboutthe first transmission resources to the terminal device via firstsignaling, the first transmission resources being transmission resourcesfor K downlink reference signals, K being a positive integer.

To be specific, the determining the first transmission resources fromthe third transmission resources may include: acquiring measurementresults of the third transmission resources measured by the terminaldevice or the base station itself in accordance with a predeterminedquality index; and determining the first transmission resources from thethird transmission resources in accordance with the measurement results.

To be specific, the measurement results of the third transmissionresources may be ranked in a descending order to acquire a rank list,and transmission resources for the downlink reference signalscorresponding to previous K measurement results in the rank list may bedetermined as the first transmission resources.

Alternatively, a first transmission beam used by a transmission resourcefor an optimal downlink reference signal may be determined in accordancewith the measurement results, K second transmission beams adjacent tothe first transmission beam may be determined with a difference betweena spatial directional angle of each second transmission beam and aspatial directional angle of the first transmission beam being within apredetermined range, and then transmission resources for K downlinkreference signals corresponding to the K second transmission beams maybe determined as the first transmission resources.

The base station may activate the transmission resources for the Kdownlink reference signals in the third transmission resources, so as totrack the large-scale channel parameter. In this implementation mode, itis assumed that the downlink reference signal is a CSI-RS, thelarge-scale channel parameter is a space parameter, and the base stationdetermines to-be-activated CSI-RS transmission resources in accordancewith a measurement result reported by the terminal device or ameasurement result acquired by the base station itself. When a certainCSI-RS transmission resource has been activated, this CSI-RStransmission resource may belong to the first transmission resources,and all the activated CSI-RS transmission resources may constitute thefirst transmission resources. For example, the base station mayconfigure for the terminal device N number of CSI-RS transmissionresources, and a CSI-RS transmitted via each CSI-RS transmissionresource may be transmitted via one beam. The terminal device maymeasure the N number of CSI-RS transmission resources, select Q numberof CSI-RS transmission resources with the best quality, and transmitidentities of the Q number of CSI-RS transmission resources and theirquality indices to the base station. The quality index may be ReferenceSignal Received Power (RSRP), Channel State Information (CSI), etc. Uponthe receipt of the information from the terminal device, the basestation may determine the to-be-activated CSI-RS transmission resourcesin accordance with the information. For example, the base station mayactivate the Q number of CSI-RS transmission resources reported by theterminal device, and at this time, K=Q. Alternatively, the base stationmay activate the CSI-RS transmission resources transmitted via K beamsadjacent to a beam for a CSI-RS transmission resource with an opticalquality index, and at this time, a value of K may be determined by thebase station in accordance with the requirement on a system overhead ora terminal device capability. Adjacent beams may refer to beams whosespatial directional angles are adjacent to each other, i.e., adifference between the spatial directional angles is within apredetermined range.

In addition, in the implementation mode, the base station may activate Knumber of CSI-RS transmission resources in N number of CSI-RStransmission resources through an MAC CE, where K is smaller than orequal to N. After signaling for activation takes effect, the terminaldevice may track the space parameter in accordance with the activated Knumber of CSI-RS transmission resources, maintain the tracking of thespace parameters of the K number of CSI-RS transmission resources, andstore the corresponding space parameters.

The K number of CSI-RS transmission resources may be periodic orsemi-persistent. For the semi-persistent CSI-RS transmission resources,the transmission of the CSI-RS may be bound to the signaling foractivation, i.e., the CSI-RS may be transmitted after the activation ofthe CSI-RS transmission resource, and the transmission of the CSI-RS maybe stopped after the deactivation of the CSI-RS transmission resource.For the semi-persistent CSI-RS transmission resources, the transmissionof the CSI-RS may also be independent of the signaling for activation,i.e., the transmission of the CSI-RS may be started and stopped underthe control of any other independent signaling.

The activation and deactivation may be performed in an incremental mode.In other words, when there is currently M1 number of activated CSI-RStransmission resources and M2 number of CSI-RS transmission resourceshave been activated by the base station through the MAC CE, theactivated CSI-RS transmission resources after the signaling foractivation takes effect may include the current M1 number of activatedCSI-RS transmission resources and the newly-added M2 number of CSI-RStransmission resources, i.e., totally M1+M2 number of CSI-RStransmission resources (in the case that M1 and M2 do not share any sameCSI-RS transmission resources). When there is currently M1 number ofactivated CSI-RS transmission resources and M3 number of CSI-RSresources have been deactivated by the base station through the MAC CE,the activated CSI-RS transmission resources after the signaling fordeactivation takes effect may include the current M1 number of activatedCSI-RS transmission resources minus the deactivated M3 number of CSI-RStransmission resources, i.e., totally M1-M3 number of CSI-RStransmission resources.

The activation and deactivation may also be performed in an absolutemode. In other words, after the signaling for activation takes effect,the activated CSI-RS transmission resources may merely include theCSI-RS transmission resources indicated in the signaling, and when thecurrent activated CSI-RS transmission resources are not located within arange indicated by the signaling for activation, the deactivation maybeperformed automatically.

Transmission of the CSI-RS Transmission Resources

A) Transmission modes of a CSI-RS transmission resource may be differentfrom each other before and after the CSI-RS transmission resource hasbeen activated. For example, periods of the CSI-RS transmission resourcemay be different, i.e., the CSI-RS transmission resource may betransmitted using a smaller period after it has been activated. Foranother example, subcarrier intervals of the CSI-RS transmissionresource may be different, i.e., the CSI-RS transmission resource may betransmitted at a larger subcarrier interval after it has been activated.For yet another aspect, transmission times of the CSI-RS transmissionresource within one period may be different, i.e., the CSI-RStransmission resource may be transmitted more times within one periodafter it has been activated.

B) A transmission mode of a CSI-RS transmission resource after it hasbeen activated may be the same as a transmission mode of the CSI-RStransmission resource before it has been activated.

Step 203: selecting transmission resources identical to or related tothe transmission parameter used by the transmission channel from thefirst transmission resources as the second transmission resources, andtransmitting indication information about the second transmissionresources to the terminal device via second signaling, the secondtransmission resources being transmission resources for L number ofdownlink reference signals, L being a positive integer, and K beinggreater than or equal to L.

To be specific, the transmission resources identical to or related tothe transmission parameter used by the transmission channel may beselected from the first transmission resources as the secondtransmission resources.

Further, the selecting the transmission resources identical to orrelated to the transmission parameter used by the transmission channelfrom the first transmission resources as the second transmissionresources may include selecting transmission resources using a sametransmission beam as the transmission channel from the firsttransmission resources as the second transmission resources.

Further, the selecting the transmission resources related to thetransmission parameter used by the transmission channel from the firsttransmission resources as the second transmission resources may includedetermining relevant transmission beams which belong to a same beamgroup as the transmission beam used by the transmission channel, andselecting transmission resources transmitted via the relevanttransmission beams from the first transmission resources as the secondtransmission resources. A plurality of transmission beams whose spatialdirectional angles may be within a predetermined range or a plurality oftransmission beams received via a same reception beam may belong to thesame beam group.

In Step 203, the base station may select the L number of CSI-RStransmission resources from the K number of transmission resources forthe downlink reference signals for tracking the large-scale channelparameter (the space parameter), e.g., the CSI-RS transmissionresources, and transmit the indication information about the L number ofCSI-RS transmission resources to the terminal device through DCI.

The terminal device may receive the DCI from the base station anddetermine the L number of CSI-RS transmission resources. The terminaldevice may determine a space parameter of a data channel or a controlchannel in accordance with the space parameter acquired on the L numberof CSI-RS transmission resources, so as to determine a reception beamfor the data channel or the control channel.

After the DCI takes effect, the base station may transmit data or acontrol signal to the terminal device via a transmission beam for thedata channel or the control channel. The terminal device may receive adata signal or a control signal using the determined reception beam.When the DCI is transmitted within a subframe (or slot) n, the DCI maytake effect within a subframe (slot) n+1, i.e., the informationindicated by the DCI may take effect within the subframe (slot) n+1.When 1=0, the DCI may take effect within the subframe (slot) where theDCI is transmitted. A value of 1 may be a constant value agreed in aprotocol, or indicated in the DCI.

The implementation of Step 203 will be described hereinafter inconjunction with the following examples.

FIRST EXAMPLE

When the base station determines that the transmission beams fortransmitting the data channel or the control channel to the terminaldevice are beams A and B, the base station may select the CSI-RSresources transmitted via the beams A and B (marked as CSI-RS resource Aand CSI-RS resource B) from the K number of CSI-RS transmissionresources for tracking the space parameter, and notify the terminaldevice of indexes of the CSI-RS resource A and the CSI-RS resource B inthe K number of CSI-RS transmission resources for tracking the spaceparameter through the DCI.

SECOND EXAMPLE

When the base station determines that the transmission beam fortransmitting the data channel or control channel to the terminal deviceis a beam A, the base station may select the CSI-RS resource transmittedvia the beam A (marked as CSI-RS resource A) from the K number of CSI-RStransmission resources for tracking the space parameter, and notify theterminal device of an index of the CSI-RS resource A in the K number ofCSI-RS transmission resources for tracking the space parameter throughthe DCI.

THIRD EXAMPLE

When the base station determines that the transmission beam fortransmitting the data channel or control channel to the terminal deviceis a beam A, the base station may select the CSI-RS resource transmittedvia a beam B belonging to a same beam group as the beam A (marked asCSI-RS resource B) from the K number of CSI-RS transmission resourcesfor tracking the space parameter, and notify the terminal device of anindex of the CSI-RS resource B in the K number of CSI-RS transmissionresources for tracking the space parameter through the DCI. Beam groupmay be grouped in accordance with spatial directional angles of thebeams, e.g., the beams whose spatial directional angles are within acertain range may belong to a same beam group. In addition, the beamgroup may also be grouped in accordance with feedback information fromthe terminal device, e.g., the terminal device may determine, inaccordance with a measurement result, that the beams received via a samereception beam belong to a same beam group, and transmit groupinformation to the base station.

The reception of the data or control signal via the reception beam A mayrefer to performing a weighting and combination operation on signalsreceived on a plurality of antenna elements using a beamforming weightedvalue corresponding to the reception beam A to acquire an output signalfor the subsequent process.

Identically, the transmission of the data or control signal via thetransmission beam B may refer to weighting an input signal (i.e., asignal from the control or data channel) using a beamforming weightedvalue corresponding to the transmission beam B and transmitting theweighted signal via a plurality of antenna elements.

According to the method for indicating the large-scale channel parameterin the second embodiment of the present disclosure, the base station mayindicate the large-scale channel parameter of the transmission channelthrough two stages of indication information, i.e., the indicationinformation from the MAC CE and the DCI, so as to enable the terminaldevice to acquire the large-scale channel parameter of the transmissionchannel in accordance with the two stages of indication information,determine the downlink reception beam for the transmission channel. Inaddition, when the large-scale channel parameter of the transmissionchannel is indicated through the two stages of indication information,it is able to make a tradeoff between the performance and the complexityin a better manner.

Third Embodiment

As shown in FIG. 3, the present disclosure provides in this embodiment amethod for indicating a large-scale channel parameter for use in a basestation, which includes the following steps.

Step 301: configuring third transmission resources for a terminaldevice, and transmitting configuration information about the thirdtransmission resources to the terminal device via third signaling, thethird transmission resources being transmission resources for N numberof downlink reference signals, N being greater than or equal to K.

This step is the same as Step 201, and thus will not be particularlydefined herein.

Step 302: processing transmission resources for the downlink referencesignals in accordance with the third transmission resources to acquirefirst transmission resources and configuration information about thefirst transmission resources, and transmitting the configurationinformation about the first transmission resources to the terminaldevice via first signaling, the configuration information includinglarge-scale channel parameter indication information indicating relevantinformation about an antenna port for each transmission resource of thefirst transmission resources and an antenna port for one or moretransmission resources of the third transmission resources with respectto the large-scale channel parameter or the group of large-scale channelparameters.

To be specific, the relevant information may be QCL information.

The base station may determine transmission resources for K number ofdownlink reference signals, so as to track the large-scale channelparameter.

The downlink reference signal may be a CSI-RS, the large-scale channelparameter may be a space parameter, and the base station may configurethe parameters, e.g., a time-frequency resource position, a period, asequence of CSI-RSs and the quantity of ports, of the K number of CSI-RStransmission resources in an MAC CE. At this time, the K number ofCSI-RS resources may be independent of the N number of CSI-RS resourcesin Step 301. Further, the configuration information about the K numberof CSI-RS transmission resources may include indication informationabout the space parameter, i.e., an antenna port for each CSI-RStransmission resource may be quasi co-located with antenna ports for theN number of CSI-RS resources with respect to one or more spaceparameters.

After signaling from the MAC CE takes effect, the terminal device maystart to track the space parameter in accordance with the K number ofCSI-RS transmission resources, maintain the tracking of the spaceparameters of the K number of CSI-RS transmission resources, and storethe corresponding space parameters.

The K number of CSI-RS transmission resources may be periodic orsemi-persistent. For the semi-persistent CSI-RS resources, thetransmission of the CSI-RS may be bound to the signaling from the MACCE, i.e., the CSI-RS may be transmitted after the signaling from the MACCE takes effect, and the transmission of the CSI-RS may be stopped afterthe signaling from the MAC CE fails. For the semi-persistent CSI-RStransmission resources, the transmission of the CSI-RS may also beindependent of the signaling for activation, i.e., the transmission ofthe CSI-RS may be started and stopped under the control of any otherindependent signaling.

Illustratively, the configuration information may include groupinformation acquired after the first transmission resources are groupedin accordance with a predetermined grouping standard, and thepredetermined grouping standard may include grouping the transmissionresources for the downlink reference signals with a same large-scalechannel parameter into one group, or grouping the transmission resourcesreceived via a same reception beam into one group, or grouping thetransmission resources having a same channel transmission requirementinto one group.

At this time, when tracking the large-scale channel parameter, theterminal device may track the transmission resources having the samegroup information in a joint manner in accordance with the configurationinformation, so as to determine the large-scale channel parameters ofthe K downlink reference signals transmitted via the first transmissionresources more rapidly.

The following description will be given when the downlink referencesignal is a CSI-RS.

The CSI-RS transmission resources may be grouped into F number ofgroups, and the CSI-RS resources having a same space parameter may begrouped into a same group. The base station may transmit the groupinformation to the terminal device through the configurationinformation.

In addition, the base station may also group the transmission resourcesin accordance with feedback information from the terminal device. Forexample, the terminal device may group, in accordance with a measurementresult, the beams (i.e., the CSI-RS transmission resources) received viaa same reception beam into one CSI-RS resource group, and transmit thegroup information to the base station.

In addition, the base station may also group the transmission resourcesin accordance with a transmission requirement of the data or controlchannel. For example, when the base station is about to transmit thedata or control signal via two transmission beams, i.e., a transmissionbeam A and a transmission beam B, but the data or control signal isreceived by the terminal device merely via one reception beam, the basestation may group a CSI-RS transmission resource corresponding to thetransmission beam A and a CSI-RS transmission resource corresponding tothe transmission beam B into one group. At this time, the terminaldevice may estimate the space parameters of the two CSI-RS transmissionresources in a joint manner, so as to determine the reception beamcapable of receiving the transmission beam A and the transmission beamB.

Step 303: selecting transmission resources identical to or related tothe transmission parameter used by the transmission channel from thefirst transmission resources as the second transmission resources, andtransmitting indication information about the second transmissionresources to the terminal device via second signaling, the secondtransmission resources being transmission resources for L number ofdownlink reference signals, L being a positive integer, and K beinggreater than or equal to L.

Step 303 is the same as Step 203, and thus will not be particularlydefined herein.

According to the method for indicating the large-scale channel parameterin the third embodiment of the present disclosure, the base station mayindicate the large-scale channel parameter of the transmission channelthrough two stages of indication information, i.e., the indicationinformation from the MAC CE and the DCI, so as to enable the terminaldevice to acquire the large-scale channel parameter of the transmissionchannel in accordance with the two stages of indication information,determine the downlink reception beam for the transmission channel. Inaddition, when the large-scale channel parameter of the transmissionchannel is indicated through the two stages of indication information,it is able to make a tradeoff between the performance and the complexityin a better manner.

Fourth Embodiment

As shown in FIG. 4, the present disclosure provides in this embodiment amethod for determining a large-scale channel parameter for use in aterminal device, which includes the following steps.

Step 401: acquiring configuration information about first transmissionresources transmitted by a base station via first signaling, the firsttransmission resources being transmission resources for K number ofdownlink reference signals, the first transmission resources beingrelated to a transmission channel for a large-scale channel parameter ora group of large-scale channel parameters, K being a positive integer.

Here, the first transmission resources may be quasi co-located with thetransmission channel for the large-scale channel parameter or the groupof large-scale channel parameters.

The terminal device may track the large-scale channel parameter or thegroup of large-scale channel parameters in accordance with the K numberof downlink reference signals.

The configuration information may include time-frequency resourcestransmitted via each antenna port for a downlink reference signal andsequence configuration information. The transmission resource for eachdownlink reference signal may include antenna ports for P downlinkreference signals, e.g., P=1, 2 or any other value. A value of P may beconfigured by the base station through signaling, i.e., the base stationmay set the value of P for the transmission resource for each downlinkreference signal, and transmit the value of P to the terminal devicethrough the configuration information about the transmission resourcefor the downlink reference signal. In addition, the value of P may alsobe a constant value, e.g., P=1 as agreed in a protocol.

The transmission resource for each downlink reference signal may betransmitted via one transmission beam, and the transmission resourcesfor different reference signals may correspond to different transmissionbeams.

Here, the configuration information about the first transmissionresources may be transmitted to the terminal device, so that theterminal device may determine the large-scale channel parameter of the Knumber of downlink reference signals transmitted via the firsttransmission resources in accordance with the configuration information.

Step 402: acquiring indication information about second transmissionresources transmitted by the base station via second signaling, thesecond transmission resources being transmission resources selected bythe base station from the first transmission resources in accordancewith a transmission parameter used by the transmission channel, thesecond transmission resources being transmission resources for L numberof downlink reference signals, L being a positive integer, and K beinggreater than or equal to L.

Here, the indication information may include information about indexesof the second transmission resources in the first transmissionresources. The second signaling may be DCI.

In Step 402, the indication information may be transmitted to theterminal device, so that the terminal device may acquire the large-scalechannel parameter of the L number of downlink reference signals in the Knumber of downlink reference signals in accordance with the indicationinformation and the large-scale channel parameter of the K number ofdownlink reference signals.

Step 403: determining the large-scale channel parameter of thetransmission channel in accordance with the indication information andthe configuration information about the first transmission resources.

In some possible embodiments of the present disclosure, Step 403 mayinclude: measuring the K downlink reference signals transmitted via thefirst transmission resources in accordance with the configurationinformation about the first transmission resources, so as to determinelarge-scale channel parameters of the K downlink reference signalstransmitted via the first transmission resources; acquiring large-scalechannel parameters of the L downlink reference signals in the K downlinkreference signals in accordance with information about indexes of thesecond transmission resources in the first transmission resources andthe large-scale channel parameters of the K downlink reference signals;and determining the large-scale channel parameter of the transmissionchannel in accordance with relevant information about the L downlinkreference signals and the transmission channel with respect to thelarge-scale channel parameter or the group of large-scale channelparameters as well as the large-scale channel parameter of the Ldownlink reference signals.

The relevant information about the L downlink reference signals and thetransmission channel with respect to the large-scale channel parameteror the group of large-scale channel parameters may be QCL information,i.e., the L downlink reference signals may be quasi co-located with thetransmission channel with respect to the large-scale channel parameteror the group of large-scale channel parameters.

When two signals are quasi co-located with each other with respect toone space parameter (space arrival angle average, space arrival anglespread, space departure angle average, or space departure angle spread),the space parameter of one signal may be derived from the spaceparameter of the other signal (e.g., the space parameters of the twosignals may be the same). When a transmitter end has notified areceiving end of the fact that a Demodulation Reference Signal (DMRS)for the data or control channel is quasi co-located with a referencesignal port or reference signal ports with respect to the spaceparameter, the receiving end may estimate the space parameter inaccordance with the reference signal port or reference signal ports,determine the reception beams, and receive the data or control signalvia the reception beams.

Subsequent to Step 403, the method may further include determining areception beam for the transmission channel in accordance with thelarge-scale parameter of the transmission channel.

Here, through determining the reception beam for the transmissionchannel in accordance with the large-scale parameter of the transmissionchannel, it is able to improve the reception reliability of the terminaldevice.

Illustratively, the configuration information may include groupinformation acquired after the first transmission resources are groupedin accordance with a predetermined grouping standard, and thepredetermined grouping standard may include grouping the transmissionresources for the downlink reference signals with a same large-scalechannel parameter into one group, or grouping the transmission resourcesreceived via a same reception beam into one group, or grouping thetransmission resources having a same channel transmission requirementinto one group.

At this time, Step 403 may include determining the large-scale channelparameter of each group of transmission resources in the firsttransmission resources in accordance with the group information.

At this time, when tracking the large-scale channel parameter, theterminal device may track the transmission resources having the samegroup information in a joint manner in accordance with the configurationinformation, so as to determine the large-scale channel parameters ofthe K downlink reference signals transmitted via the first transmissionresources more rapidly.

Prior to Step 401, the method may further include: acquiring thirdtransmission resources transmitted by the base station via the firstsignaling, the third transmission resources being transmission resourcesfor N downlink reference signals, N being greater than or equal to K;and measuring the third transmission resources in accordance with apredetermined quality index to acquire measurement results, andtransmitting the measurement results to the base station, so as toenable the base station to determine the first transmission resourcesfrom the third transmission resources in accordance with the measurementresults.

Here, the downlink reference signal may be a CSI-RS, and the large-scalechannel parameter may be a space parameter. The terminal device maymeasure the N number of CSI-RS transmission resources, select Q numberof CSI-RS transmission resources with the best quality, and transmitidentities of the Q number of CSI-RS transmission resources and theirquality indices to the base station. The quality index may be RSRP, CSI,etc. Upon the receipt of the information from the terminal device, thebase station may determine to-be-activated CSI-RS transmission resourcesin accordance with the information. For example, the base station mayactivate the Q number of CSI-RS transmission resources reported by theterminal device, and at this time, K=Q. Alternatively, the base stationmay activate the CSI-RS transmission resources transmitted via K beamsadjacent to a beam for a CSI-RS transmission resource with an opticalquality index, and at this time, a value of K may be determined by thebase station in accordance with the requirement on a system overhead ora terminal device capability. Adjacent beams may refer to beams whosespatial directional angles are adjacent to each other.

According to the method for determining the large-scale channelparameter in the fourth embodiment of the present disclosure, theterminal device may acquire the configuration information about thefirst transmission resources transmitted via the first signaling, thefirst transmission resources may be transmission resources for Kdownlink reference signals, the first transmission resources may berelated to the transmission channel for the large-scale channelparameter or the group of large-scale channel parameters, and K may be apositive integer. Next, the terminal device may acquire the indicationinformation about the second transmission resources transmitted by thebase station via the second signaling, the second transmission resourcesmay be transmission resources selected by the base station from thefirst transmission resources in accordance with the transmissionparameter used by the transmission channel, the second transmissionresources may be transmission resources for the L downlink referencesignals, L may be a positive integer, and K may be greater than or equalto L. Then, the terminal device may determine the large-scale channelparameter of the transmission channel in accordance with the indicationinformation and the configuration information about the firsttransmission resources. As a result, it is able for the terminal deviceto determine the corresponding reception beam in accordance with thelarge-scale channel parameter of the transmission channel, thereby toimprove the reception reliability of the terminal device.

Fifth Embodiment

As shown in FIG. 5, the present disclosure further provides in thisembodiment a base station, which includes: a first processing module 501configured to determine first transmission resources related to atransmission channel for a large-scale channel parameter or a group oflarge-scale channel parameters, and transmit configuration informationabout the first transmission resources to a terminal device via firstsignaling, the first transmission resources being transmission resourcesfor K downlink reference signals, K being a positive integer; and asecond processing module 502 configured to select second transmissionresources from the first transmission resources in accordance with atransmission parameter used by the transmission channel, and transmitindication information about the second transmission resources to theterminal device via second signaling, the second transmission resourcesbeing transmission resources for L downlink reference signals, L being apositive integer, and K being greater than or equal to L.

In some possible embodiments of the present disclosure, the indicationinformation may include information about indexes of the secondtransmission resources in the first transmission resources.

In some possible embodiments of the present disclosure, theconfiguration information may include group information acquired afterthe first transmission resources are grouped in accordance with apredetermined grouping standard, and the predetermined grouping standardmay include grouping the transmission resources for the downlinkreference signals with a same large-scale channel parameter into onegroup, or grouping the transmission resources received via a samereception beam into one group, or grouping the transmission resourceshaving a same channel transmission requirement into one group.

As shown in FIG. 6, the base station may further include a configurationmodule 500 configured to configure third transmission resources for theterminal device, and transmit configuration information about the thirdtransmission resources to the terminal device via third signaling. Thethird transmission resources may be transmission resources for Ndownlink reference signals, where N is greater than or equal to K.

In some possible embodiments of the present disclosure, the firstprocessing module 501 is further configured to determine the firsttransmission resources from the third transmission resources.

In some possible embodiments of the present disclosure, the firstprocessing module 501 may include: a first acquisition sub-module 5011configured to acquire measurement results of the third transmissionresources measured by the terminal device or the base station itself inaccordance with a predetermined quality index; and a first determinationsub-module 5012 configured to determine the first transmission resourcesfrom the third transmission resources in accordance with the measurementresults.

In some possible embodiments of the present disclosure, the firstdetermination sub-module 5012 may include: a ranking unit 50121configured to rank the measurement results of the third transmissionresources in a descending order to acquire a rank list; and a firstdetermination unit 50122 configured to determine transmission resourcesfor the downlink reference signals corresponding to previous Kmeasurement results in the rank list as the first transmissionresources.

In some possible embodiments of the present disclosure, the firstdetermination sub-module 5012 may include: a second determination unit50123 configured to determine a first transmission beam used by atransmission resource for an optimal downlink reference signal inaccordance with the measurement results; a third determination unit50124 configured to determine K second transmission beams adjacent tothe first transmission beam, a difference between a spatial directionalangle of each second transmission beam and a spatial directional angleof the first transmission beam being within a predetermined range; and afourth determination unit 50125 configured to determine transmissionresources for K downlink reference signals corresponding to the K secondtransmission beams as the first transmission resources.

In some possible embodiments of the present disclosure, the firstprocessing module 501 is further configured to process transmissionresources for the downlink reference signals through an MAC CE inaccordance with the third transmission resources, so as to acquire thefirst transmission resources and the configuration information about thefirst transmission resources.

In some possible embodiments of the present disclosure, theconfiguration information may include large-scale channel parameterindication information indicating relevant information about an antennaport for each transmission resource of the first transmission resourcesand an antenna port for one or more transmission resources of the thirdtransmission resources with respect to the large-scale channel parameteror the group of large-scale channel parameters.

In some possible embodiments of the present disclosure, the secondprocessing module 502 is further configured to select transmissionresources identical to or related to the transmission parameter used bythe transmission channel from the first transmission resources as thesecond transmission resources.

In some possible embodiments of the present disclosure, the secondprocessing module 502 may include a first selection sub-module 5021configured to select transmission resources using a same transmissionbeam as the transmission channel from the first transmission resourcesas the second transmission resources.

In some possible embodiments of the present disclosure, the secondprocessing module 502 may include a second selection sub-module 5022configured to determine relevant transmission beams which belong to asame beam group as the transmission beam used by the transmissionchannel, and select transmission resources transmitted via the relevanttransmission beams from the first transmission resources as the secondtransmission resources. A plurality of transmission beams whose spatialdirectional angles may be within a predetermined range or a plurality oftransmission beams received via a same reception beam may belong to thesame beam group.

In some possible embodiments of the present disclosure, the firstsignaling may be signaling from the MAC Control Element (MAC CE), andthe second signaling may be DCI.

In some possible embodiments of the present disclosure, the large-scalechannel parameter may include space parameter, delay spread, averagedelay, Doppler frequency offset, Doppler spread or average gain. Thegroup of large-scale channel parameters may include at least two ofspace parameter, delay spread, average delay, Doppler frequency offset,Doppler spread and average gain.

It should be appreciated that, the base station may correspond to themethods for indicating the large-scale channel parameter, so theimplementation of the base station may refer to that of the methodmentioned hereinabove, with a same technical effect.

According to the base station in the fifth embodiment of the presentdisclosure, the base station may determine the first transmissionresources related to the transmission channel for the large-scalechannel parameter of the group of large-scale channel parameters andtransmit the configuration information about the first transmissionresources to the terminal device via the first signaling, and the firsttransmission resources may be transmission resources for the K downlinkreference signals. Then, the base station may select the secondtransmission resources from the first transmission resources inaccordance with a transmission parameter used by the transmissionchannel and transmit the indication information about the secondtransmission resources to the terminal device via the second signaling,and the second transmission resources may be transmission resources forthe L downlink reference signals. As a result, it is able for theterminal device to determine the large-scale channel parameter of thetransmission channel in accordance with the indication information andthe configuration information about the first transmission resources,and determine the corresponding reception beam in accordance with thelarge-scale channel parameter of the transmission channel, thereby toimprove the reception reliability of the terminal device.

Sixth Embodiment

As shown in FIG. 7, the present disclosure further provides in thisembodiment a base station, which includes a processor 700, a memory 720connected to the processor 700 via a bus interface, and a transceiver700 connected to the processor 700 via the bus interface. The memory 720is configured to store therein programs and data for the operation ofthe processor. Data information or pilot signals are transmitted throughthe transceiver 710, and an uplink control channel is received throughthe transceiver 710. The processor 700 is configured to call and executethe programs and data stored in the memory 720, so as to achieve thefunctions of the following modules: a first processing module configuredto determine first transmission resources related to a transmissionchannel for a large-scale channel parameter or a group of large-scalechannel parameters, and transmit configuration information about thefirst transmission resources to a terminal device via first signaling,the first transmission resources being transmission resources for Kdownlink reference signals, K being a positive integer; and a secondprocessing module configured to select second transmission resourcesfrom the first transmission resources in accordance with a transmissionparameter used by the transmission channel, and transmit indicationinformation about the second transmission resources to the terminaldevice via second signaling, the second transmission resources beingtransmission resources for L downlink reference signals, L being apositive integer, and K being greater than or equal to L.

The processor 700 is further configured to read the programs stored inthe memory 720, so as to: determine first transmission resources relatedto a transmission channel for a large-scale channel parameter or a groupof large-scale channel parameters, and transmit configurationinformation about the first transmission resources to a terminal devicevia first signaling, the first transmission resources being transmissionresources for K downlink reference signals, K being a positive integer;and select second transmission resources from the first transmissionresources in accordance with a transmission parameter used by thetransmission channel, and transmit indication information about thesecond transmission resources to the terminal device via secondsignaling, the second transmission resources being transmissionresources for L downlink reference signals, L being a positive integer,and K being greater than or equal to L.

The transceiver 710 is configured to receive and transmit data under thecontrol of the processor 700.

In FIG. 7, bus architecture may include a number of buses and bridgesconnected to each other, so as to connect various circuits for one ormore processors 700 and one or more memories 720. In addition, as isknown in the art, the bus architecture 1000 may be used to connect anyother circuits, such as a circuit for a peripheral device, a circuit fora voltage stabilizer and a power management circuit, which are notparticularly defined herein. The bus interface may be are provided, andthe transceiver 710 may consist of a plurality of elements, e.g., atransmitter and a receiver for communication with any other devices overa transmission medium. The processor 700 may take charge of managing thebus architecture as well general processings. The memory 720 may storedata therein for the operation of the processor 700.

According to the base station in the sixth embodiment of the presentdisclosure, the processor 700 may determine the first transmissionresources related to the transmission channel for the large-scalechannel parameter of the group of large-scale channel parameters andtransmit the configuration information about the first transmissionresources to the terminal device via the first signaling, and the firsttransmission resources may be transmission resources for the K downlinkreference signals. Then, the base station may select the secondtransmission resources from the first transmission resources inaccordance with a transmission parameter used by the transmissionchannel and transmit the indication information about the secondtransmission resources to the terminal device via the second signaling,and the second transmission resources may be transmission resources forthe L downlink reference signals. As a result, it is able for theterminal device to determine the large-scale channel parameter of thetransmission channel in accordance with the indication information andthe configuration information about the first transmission resources,and determine the corresponding reception beam in accordance with thelarge-scale channel parameter of the transmission channel, thereby toimprove the reception reliability of the terminal device.

Seventh Embodiment

As shown in FIG. 8, the present disclosure further provides in thisembodiment a terminal device, which includes: a first acquisition module801 configured to acquire configuration information about firsttransmission resources transmitted by a base station via firstsignaling, the first transmission resources being transmission resourcesfor K downlink reference signals, the first transmission resources beingrelated to a transmission channel for a large-scale channel parameter ora group of large-scale channel parameters, K being a positive integer; asecond acquisition module 802 configured to acquire indicationinformation about second transmission resources transmitted by the basestation via second signaling, the second transmission resources beingtransmission resources selected by the base station from the firsttransmission resources in accordance with a transmission parameter usedby the transmission channel, the second transmission resources beingtransmission resources for L downlink reference signals, L being apositive integer, and K being greater than or equal to L; and a firstdetermination module 803 configured to determine the large-scale channelparameter of the transmission channel in accordance with the indicationinformation and the configuration information about the firsttransmission resources.

As shown in FIG. 9, the terminal device may further include a seconddetermination module 804 configured to determine a reception beam forthe transmission channel in accordance with the large-scale parameter ofthe transmission channel.

In some possible embodiments of the present disclosure, the firstdetermination module 803 may include: a second determination sub-module8031 configured to measure the K downlink reference signals transmittedvia the first transmission resources in accordance with theconfiguration information about the first transmission resources, so asto determine large-scale channel parameters of the K downlink referencesignals transmitted via the first transmission resources; a secondacquisition sub-module 8032 configured to acquire large-scale channelparameters of the L downlink reference signals in the K downlinkreference signals in accordance with information about indexes of thesecond transmission resources in the first transmission resources andthe large-scale channel parameters of the K downlink reference signals;and a third determination sub-module 8033 configured to determine thelarge-scale channel parameter of the transmission channel in accordancewith relevant information about the L downlink reference signals and thetransmission channel with respect to the large-scale channel parameteror the group of large-scale channel parameters as well as thelarge-scale channel parameter of the L downlink reference signals.

In some possible embodiments of the present disclosure, theconfiguration information may include group information acquired afterthe first transmission resources are grouped in accordance with apredetermined grouping standard, and the predetermined grouping standardmay include grouping the transmission resources for the downlinkreference signals with a same large-scale channel parameter into onegroup, or grouping the transmission resources received via a samereception beam into one group, or grouping the transmission resourceshaving a same channel transmission requirement into one group. The firstdetermination module 803 is further configured to determine thelarge-scale channel parameter of each group of transmission resources inthe first transmission resources in accordance with the groupinformation.

The terminal device may further include: a third acquisition module 805configured to acquire third transmission resources transmitted by thebase station via the first signaling, the third transmission resourcesbeing transmission resources for N downlink reference signals, N beinggreater than or equal to K; and a measurement module 806 configured tomeasure the third transmission resources in accordance with apredetermined quality index to acquire measurement results, and transmitthe measurement results to the base station, so as to enable the basestation to determine the first transmission resources from the thirdtransmission resources in accordance with the measurement results.

It should be appreciated that, the terminal device may correspond to themethods for determining the large-scale channel parameter, so theimplementation of the terminal device may refer to that of the methodmentioned hereinabove, with a same technical effect.

According to the terminal device in the seventh embodiment of thepresent disclosure, the terminal device may acquire the configurationinformation about the first transmission resources transmitted via thefirst signaling, the first transmission resources may be transmissionresources for K downlink reference signals, the first transmissionresources may be related to the transmission channel for the large-scalechannel parameter or the group of large-scale channel parameters, and Kmay be a positive integer. Next, the terminal device may acquire theindication information about the second transmission resourcestransmitted by the base station via the second signaling, the secondtransmission resources may be transmission resources selected by thebase station from the first transmission resources in accordance withthe transmission parameter used by the transmission channel, the secondtransmission resources may be transmission resources for the L downlinkreference signals, L may be a positive integer, and K may be greaterthan or equal to L. Then, the terminal device may determine thelarge-scale channel parameter of the transmission channel in accordancewith the indication information and the configuration information aboutthe first transmission resources. As a result, it is able for theterminal device to determine the corresponding reception beam inaccordance with the large-scale channel parameter of the transmissionchannel, thereby to improve the reception reliability of the terminaldevice.

Eighth Embodiment

As shown in FIG. 10, the present disclosure further provides in thisembodiment a terminal device, which includes a processor 1000, a memory1020 connected to the processor 1000 via a bus interface, and atransceiver 1010 connected to the processor via the bus interface. Thememory 1020 is configured to store therein programs and data for theoperation of the processor. Data information or pilot signals aretransmitted through the transceiver 1010, and an uplink control channelis received through the transceiver 1010. The processor 1000 isconfigured to call and execute the programs and data stored in thememory 1020, so as to achieve the functions of the following modules: afirst acquisition module configured to acquire configuration informationabout first transmission resources transmitted by a base station viafirst signaling, the first transmission resources being transmissionresources for K downlink reference signals, the first transmissionresources being related to a transmission channel for a large-scalechannel parameter or a group of large-scale channel parameters, K beinga positive integer; a second acquisition module configured to acquireindication information about second transmission resources transmittedby the base station via second signaling, the second transmissionresources being transmission resources selected by the base station fromthe first transmission resources in accordance with a transmissionparameter used by the transmission channel, the second transmissionresources being transmission resources for L downlink reference signals,L being a positive integer, and K being greater than or equal to L; anda first determination module configured to determine the large-scalechannel parameter of the transmission channel in accordance with theindication information and the configuration information about the firsttransmission resources.

The processor 1000 is configured to read the programs stored in thememory 1020, so as to: acquire configuration information about firsttransmission resources transmitted by a base station via firstsignaling, the first transmission resources being transmission resourcesfor K downlink reference signals, the first transmission resources beingrelated to a transmission channel for a large-scale channel parameter ora group of large-scale channel parameters, K being a positive integer;acquire indication information about second transmission resourcestransmitted by the base station via second signaling, the secondtransmission resources being transmission resources selected by the basestation from the first transmission resources in accordance with atransmission parameter used by the transmission channel, the secondtransmission resources being transmission resources for L downlinkreference signals, L being a positive integer, and K being greater thanor equal to L; and determine the large-scale channel parameter of thetransmission channel in accordance with the indication information andthe configuration information about the first transmission resources.

The transceiver 1010 is configured to receive and transmit data underthe control of the processor 1000.

In FIG. 10, bus architecture may include a number of buses and bridgesconnected to each other, so as to connect various circuits for one ormore processors 1000 and one or more memories 1020. In addition, as isknown in the art, the bus architecture may be used to connect any othercircuits, such as a circuit for a peripheral device, a circuit for avoltage stabilizer and a power management circuit, which are notparticularly defined herein. The bus interface may be provided, and thetransceiver 1010 may consist of a plurality of elements, e.g., atransmitter and a receiver for communication with any other devices overa transmission medium. With respect to different UEs, a user interface1030 may also be provided for devices which are to be arranged inside oroutside the UE, and these devices may include but not limited to akeypad, a display, a speaker, a microphone and a joystick. The processor1000 may take charge of managing the bus architecture as well as generalprocessings. The memory 1020 may store therein data for the operation ofthe processor 1000.

According to the terminal device in the eighth embodiment of the presentdisclosure, the terminal device may acquire the configurationinformation about the first transmission resources transmitted via thefirst signaling, the first transmission resources may be transmissionresources for K downlink reference signals, the first transmissionresources may be related to the transmission channel for the large-scalechannel parameter or the group of large-scale channel parameters, and Kmay be a positive integer. Next, the terminal device may acquire theindication information about the second transmission resourcestransmitted by the base station via the second signaling, the secondtransmission resources may be transmission resources selected by thebase station from the first transmission resources in accordance withthe transmission parameter used by the transmission channel, the secondtransmission resources may be transmission resources for the L downlinkreference signals, L may be a positive integer, and K may be greaterthan or equal to L. Then, the terminal device may determine thelarge-scale channel parameter of the transmission channel in accordancewith the indication information and the configuration information aboutthe first transmission resources. As a result, it is able for theterminal device to determine the corresponding reception beam inaccordance with the large-scale channel parameter of the transmissionchannel, thereby to improve the reception reliability of the terminaldevice.

The above embodiments are for illustrative purposes only, but thepresent disclosure is not limited thereto. Obviously, a person skilledin the art may make further modifications and improvements withoutdeparting from the spirit of the present disclosure, and thesemodifications and improvements shall also fall within the scope of thepresent disclosure.

1. A method for indicating a large-scale channel parameter, comprising:determining first transmission resources related to a transmissionchannel for a large-scale channel parameter or a group of large-scalechannel parameters, and transmitting configuration information about thefirst transmission resources to a terminal device via first signaling,the first transmission resources being transmission resources for Kdownlink reference signals, K being a positive integer; and selectingsecond transmission resources from the first transmission resources inaccordance with a transmission parameter used by the transmissionchannel, and transmitting indication information about the secondtransmission resources to the terminal device via second signaling, thesecond transmission resources being transmission resources for Ldownlink reference signals, L being a positive integer, and K beinggreater than or equal to L.
 2. The method according to claim 1, whereinthe indication information comprises information about indexes of thesecond transmission resources in the first transmission resources. 3.The method according to claim 1, wherein the configuration informationcomprises group information acquired after the first transmissionresources are grouped in accordance with a predetermined groupingstandard, and the predetermined grouping standard comprises grouping thetransmission resources for the downlink reference signals with a samelarge-scale channel parameter into one group, or grouping thetransmission resources received via a same reception beam into onegroup, or grouping the transmission resources having a same channeltransmission requirement into one group.
 4. The method according toclaim 1, wherein prior to determining the first transmission resourcesrelated to the transmission channel for the large-scale channelparameter or the group of large-scale channel parameters, the methodfurther comprises: configuring third transmission resources for theterminal device, and transmitting configuration information about thethird transmission resources to the terminal device via third signaling,wherein the third transmission resources are transmission resources forN downlink reference signals, where N is greater than or equal to K. 5.The method according to claim 4, wherein the determining the firsttransmission resources related to the transmission channel for thelarge-scale channel parameter or the group of large-scale channelparameters comprises: determining the first transmission resources fromthe third transmission resources.
 6. The method according to claim 5,wherein the determining the first transmission resources from the thirdtransmission resources comprises: acquiring measurement results of thethird transmission resources measured by the terminal device or a basestation itself in accordance with a predetermined quality index; anddetermining the first transmission resources from the third transmissionresources in accordance with the measurement results.
 7. The methodaccording to claim 6, wherein the determining the first transmissionresources from the third transmission resources in accordance with themeasurement results comprises: ranking the measurement results of thethird transmission resources in a descending order to acquire a ranklist; and determining transmission resources for the downlink referencesignals corresponding to previous K measurement results in the rank listas the first transmission resources.
 8. The method according to claim 6,wherein the determining the first transmission resources from the thirdtransmission resources in accordance with the measurement resultscomprises: determining a first transmission beam used by a transmissionresource for an optimal downlink reference signal in accordance with themeasurement results; determining K second transmission beams adjacent tothe first transmission beam, a difference between a spatial directionalangle of each second transmission beam and a spatial directional angleof the first transmission beam being within a predetermined range; anddetermining transmission resources for K downlink reference signalscorresponding to the K second transmission beams as the firsttransmission resources.
 9. The method according to claim 4, wherein thedetermining the first transmission resources related to the transmissionchannel for the large-scale channel parameter or the group oflarge-scale channel parameters comprises: processing transmissionresources for the downlink reference signals in accordance with thethird transmission resources, so as to acquire the first transmissionresources and the configuration information about the first transmissionresources, wherein the configuration information comprises large-scalechannel parameter indication information indicating relevant informationabout an antenna port for each transmission resource of the firsttransmission resources and an antenna port for one or more transmissionresources of the third transmission resources with respect to thelarge-scale channel parameter or the group of large-scale channelparameters.
 10. The method according to claim 1, wherein the selectingthe second transmission resources from the first transmission resourcesin accordance with the transmission parameter used by the transmissionchannel comprises: selecting transmission resources identical to orrelated to the transmission parameter used by the transmission channelfrom the first transmission resources as the second transmissionresources.
 11. The method according to claim 10, wherein the selectingthe transmission resources identical to or related to the transmissionparameter used by the transmission channel from the first transmissionresources as the second transmission resources comprises: selectingtransmission resources using a same transmission beam as thetransmission channel from the first transmission resources as the secondtransmission resources.
 12. The method according to claim 10, whereinthe selecting the transmission resources related to the transmissionparameter used by the transmission channel from the first transmissionresources as the second transmission resources comprises: determiningrelevant transmission beams which belong to a same beam group as thetransmission beam used by the transmission channel, and selectingtransmission resources transmitted via the relevant transmission beamsfrom the first transmission resources as the second transmissionresources, wherein a plurality of transmission beams whose spatialdirectional angles are within a predetermined range or a plurality oftransmission beams received via a same reception beam belong to the samebeam group.
 13. The method according to claim 1, wherein the firstsignaling is signaling from a Media Access Control (MAC) Control Element(CE), and the second signaling is Downlink Control Information (DCI):wherein the large-scale channel parameter comprises space parameter,delay spread, average delay, Doppler frequency offset, Doppler spread oraverage gain, and the group of large-scale channel parameters compriseat least two of space parameter, delay spread, average delay, Dopplerfrequency offset, Doppler spread and average gain.
 14. (canceled)
 15. Amethod for determining a large-scale channel parameter, comprising:acquiring configuration information about first transmission resourcestransmitted by a base station via first signaling, the firsttransmission resources being transmission resources for K downlinkreference signals, the first transmission resources being related to atransmission channel for a large-scale channel parameter or a group oflarge-scale channel parameters, K being a positive integer; acquiringindication information about second transmission resources transmittedby the base station via second signaling, the second transmissionresources being transmission resources selected by the base station fromthe first transmission resources in accordance with a transmissionparameter used by the transmission channel, the second transmissionresources being transmission resources for L downlink reference signals,L being a positive integer, and K being greater than or equal to L; anddetermining the large-scale channel parameter of the transmissionchannel in accordance with the indication information and theconfiguration information about the first transmission resources. 16.The method according to claim 15, wherein subsequent to determining thelarge-scale channel parameter of the transmission channel in accordancewith the indication information and the configuration information aboutthe first transmission resources, the method further comprises:determining a reception beam for the transmission channel in accordancewith the large-scale parameter of the transmission channel.
 17. Themethod according to claim 15, wherein the determining the large-scalechannel parameter of the transmission channel in accordance with theindication information and the configuration information about the firsttransmission resource comprises: measuring the K downlink referencesignals transmitted via the first transmission resources in accordancewith the configuration information about the first transmissionresources, so as to determine large-scale channel parameters of the Kdownlink reference signals transmitted via the first transmissionresources; acquiring large-scale channel parameters of the L downlinkreference signals in the K downlink reference signals in accordance withinformation about indexes of the second transmission resources in thefirst transmission resources and the large-scale channel parameters ofthe K downlink reference signals; and determining the large-scalechannel parameter of the transmission channel in accordance withrelevant information about the L downlink reference signals and thetransmission channel with respect to the large-scale channel parameteror the group of large-scale channel parameters as well as thelarge-scale channel parameter of the L downlink reference signals. 18.The method according to claim 17, wherein the configuration informationcomprises group information acquired after the first transmissionresources are grouped in accordance with a predetermined groupingstandard, and the predetermined grouping standard comprises grouping thetransmission resources for the downlink reference signals with a samelarge-scale channel parameter into one group, or grouping thetransmission resources received via a same reception beam into onegroup, or grouping the transmission resources having a same channeltransmission requirement into one group, wherein the determining thelarge-scale channel parameter of the K downlink reference signalstransmitted via the first transmission resources in accordance with theconfiguration information about the first transmission resourcescomprises: determining the large-scale channel parameter of each groupof transmission resources in the first transmission resources inaccordance with the group information.
 19. The method according to claim15, wherein prior to acquiring the configuration information about thefirst transmission resources transmitted by the base station via thefirst signaling, the method further comprises: acquiring thirdtransmission resources transmitted by the base station via the firstsignaling, the third transmission resources being transmission resourcesfor N downlink reference signals, N being greater than or equal to K;and measuring the third transmission resources in accordance with apredetermined quality index to acquire measurement results, andtransmitting the measurement results to the base station, so as toenable the base station to determine the first transmission resourcesfrom the third transmission resources in accordance with the measurementresults. 20-38. (canceled)
 39. A network side device, comprising aprocessor, a memory, and a computer program stored in the memory andexecuted by the processor, wherein the processor is configured toexecute the computer program so as to implement a method for indicatinga large-scale channel parameter, comprising: determining firsttransmission resources related to a transmission channel for alarge-scale channel parameter or a group of large-scale channelparameters, and transmitting configuration information about the firsttransmission resources to a terminal device via first signaling, thefirst transmission resources being transmission resources for K downlinkreference signals, K being a positive integer; and selecting secondtransmission resources from the first transmission resources inaccordance with a transmission parameter used by the transmissionchannel, and transmitting indication information about the secondtransmission resources to the terminal device via second signaling, thesecond transmission resources being transmission resources for Ldownlink reference signals, L being a positive integer, and K beinggreater than or equal to L.
 40. A terminal side device, comprising aprocessor, a memory, and a computer program stored in the memory andexecuted by the processor. The processor is configured to execute thecomputer program so as to implement the method according to claim 15.41-42. (canceled)